（2.65+2.77）÷（2.98-0.98） 3.7x91.6+6.3x91.6 0.45x12x0.2÷9 6.2x2.1-2.1x2.8-2.8x0.15 2.8x1.43+0.57x2.8 10-6.06+8.5x0.2 6x0.25x1.8x5 144÷3.6+27.2x0.5 0.87x3.16+4.64x0.87 6.8x0.75÷0.5x4 13.75÷0.125-2.75 53+23.4÷7.8÷0.6 2.881÷0.43-0.24x3.5 28-(3.4+1.25x2.4) (31.8+3.2x4)÷5 31.5x4÷(5.36+3.64) 0.64x25x7.8+2.2 2÷2.5+2.5÷2 194-64.8÷1.8x0.9 36.72÷4.25x9.9 5180-705x6 24÷2.4-2.5x0.8 3.416÷(0.016x35) 5.12+2.54+4.88+7.46 12.5x17.25x0.4x0.8 9.9x2.5+201x3.45 9.4x5.8+10.6x5.8 0.125x0.32x0.25 9.6x0.01+9.6x0.99 2.8x7.6+1.4x2.8+2.8 6.3x10.1+7.3x0.99 0.25x64x12.5 3.7x91.6+6.3x91.6 16.84÷40÷0.25 12.5x0.4x2.5x0.8 9.5x101+85x9.9 4.2x7.8+22x0.42 2.55x7.1+24.5x0.71 0.7744÷(0.16x5.5) 21.4÷2.14-20.5x0.16 80.08-7.05x6.2 18.36÷8.5x19.9 194-64.8÷1.8x0.9 0.3÷(1.25x0.32x7.5) 3.78x5÷(1.26x5) (1.2+13.2x4)÷108 22÷(13.4-11.25x0.8) (27.8-15.6)x0.8x0.5 3.26x10.1-0.1x3.26 9.12÷57+4.84-3.77 42.72÷0.48+0.52 2.33x0.25x1.5x4 0.21÷1.4+2.6 7.06x2.4-5.7
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